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  1. Article ; Online: EGF-expressed human mesenchymal stem cells inhibit collagenase1 expression in keratinocytes.

    Lee, Jeong Hyun / Chellasamy, Gayathri / Yun, Kyusik / Nam, Myeong Jin

    Cellular signalling

    2023  Volume 110, Page(s) 110827

    Abstract: Mesenchymal stem cells (MSCs) repair tissue injury by upregulating the paracrine secretion of cytokines and growth factors. Human MSC has been recognized as a promising therapeutic material for treatment of various human diseases. Even though the effect ... ...

    Abstract Mesenchymal stem cells (MSCs) repair tissue injury by upregulating the paracrine secretion of cytokines and growth factors. Human MSC has been recognized as a promising therapeutic material for treatment of various human diseases. Even though the effect of epidermal growth factor (EGF) has been well investigated, the synergetic effect of EGF and MSC has not been studied. Therefore, we expect our basic study to contribute to developing new therapeutic reagents for skin diseases or innovative cosmetics. In this study, we examined the effect of human epidermal growth factor-transfected MSCs (hEGF MSCs) on human keratinocyte HaCaT cell proliferation and the mechanisms that regulate matrix metalloproteinase (MMP)-1 expression in HaCaT cells. To identify the hEGF plasmid and its transfection into MSCs, we performed gel electrophoresis and quantitative PCR. Proliferation and migration of HaCaT cells were examined using water Soluble Tetrazolium (WST-1) and wound-healing assays, respectively. Zymography was performed to investigate the correlation between hEGF MSC-conditioned medium (CM)-treated HaCaT cells and MMP-1 expression. We found that cell proliferation and wound-healing rates were increased in hEGF MSC-CM-treated HaCaT cells compared to those in MSC-CM-treated cells, and conversely collagenase activity was decreased. The mRNA and protein levels of MMP-1 were also decreased in hEGF MSC-CM-treated HaCaT cells. 2-DE analysis showed that the expression of carboxypeptidase, which promotes growth factors and wound healing, was increased in hEGF MSC-CM-treated HaCaT cells. Finally, western blot was used to determine whether MMP-1 expression was reduced via the mitogen-activated protein kinase (MAPK) pathway; the results showed that the levels of MAPK pathway-related proteins (pErk, pJNK, and p-p38) and the levels of transcription factors (pCREB, NFκB, and p-c-Fos) were decreased. In addition, pAkt expression was found to be elevated. The results of our study suggest that hEGF MSCs promote cell proliferation and reduce MMP-1 expression via the MAPK pathway in human keratinocyte HaCaT cells.
    MeSH term(s) Humans ; Epidermal Growth Factor/metabolism ; Matrix Metalloproteinase 1/genetics ; Matrix Metalloproteinase 1/metabolism ; Keratinocytes/metabolism ; Cell Proliferation ; Mitogen-Activated Protein Kinases/metabolism ; Mesenchymal Stem Cells/metabolism ; Culture Media, Conditioned/pharmacology
    Chemical Substances Epidermal Growth Factor (62229-50-9) ; Matrix Metalloproteinase 1 (EC 3.4.24.7) ; Mitogen-Activated Protein Kinases (EC 2.7.11.24) ; Culture Media, Conditioned
    Language English
    Publishing date 2023-07-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1002702-6
    ISSN 1873-3913 ; 0898-6568
    ISSN (online) 1873-3913
    ISSN 0898-6568
    DOI 10.1016/j.cellsig.2023.110827
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Fabrication of label-free immunoprobe for monkeypox A29 detection using one-step electrodeposited molybdenum oxide-graphene quantum rods.

    Chandran, Murugesan / Chellasamy, Gayathri / Veerapandian, Mekala / Dhanasekaran, Barkavi / Kumar Arumugasamy, Shiva / Govindaraju, Saravanan / Yun, Kyusik

    Journal of colloid and interface science

    2024  Volume 660, Page(s) 412–422

    Abstract: Monkeypox is a zoonotic viral infection caused by the monkeypox virus (MPXV), which belongs to the Poxviridae family of the Orthopoxvirus (OPXV) genus. Monkeypox is transmitted from animals to humans and humans to humans; therefore, the accurate and ... ...

    Abstract Monkeypox is a zoonotic viral infection caused by the monkeypox virus (MPXV), which belongs to the Poxviridae family of the Orthopoxvirus (OPXV) genus. Monkeypox is transmitted from animals to humans and humans to humans; therefore, the accurate and early detection of MPXV is crucial for reducing mortality. A novel graphene-based material, graphene quantum rods (GQRs) was synthesized and confirmed using high-resolution transmission electron microscopy (HR-TEM) and atomic force microscopy (AFM). In this study, molybdenum oxide was electrodeposited and one-pot electrodeposition of MoO
    MeSH term(s) Animals ; Humans ; Mpox (monkeypox) ; Graphite/chemistry ; Monkeypox virus ; Molybdenum/chemistry
    Chemical Substances molybdenum oxide ; Graphite (7782-42-5) ; Molybdenum (81AH48963U)
    Language English
    Publishing date 2024-01-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 241597-5
    ISSN 1095-7103 ; 0021-9797
    ISSN (online) 1095-7103
    ISSN 0021-9797
    DOI 10.1016/j.jcis.2023.12.188
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Remediation of microplastics using bionanomaterials: A review

    Chellasamy, Gayathri / Kiriyanthan, Rose Mary / Maharajan, Theivanayagam / Radha, A. / Yun, Kyusik

    Environmental research. 2022 May 15, v. 208

    2022  

    Abstract: Pollution by microplastics (MPs) formed by the physicochemical breakdown of plastics are a worldwide issue with long-lasting and hazardous natural effects. The natural expulsion of MPs takes several years and can be dangerous. Several effective ... ...

    Abstract Pollution by microplastics (MPs) formed by the physicochemical breakdown of plastics are a worldwide issue with long-lasting and hazardous natural effects. The natural expulsion of MPs takes several years and can be dangerous. Several effective technological innovations have been developed over the years to remediate harmful MPs. Among them, a blend of nanotechnological techniques using bionanomaterials has been investigated to a large extent. The objective of this review is to compile the MPs found in the environment and bionanomaterial-based approaches for their removal. This information is important for researchers who are exploring the adverse consequences of MPs and their remediation and developing advanced eco-friendly strategies to control and eradicate MPs in the future. The control and eradication of MPs depend on all of us; hence, the proper awareness of MPs pollution must be provided to every individual, as all of us are a part of the environment.
    Keywords microplastics ; pollution ; remediation ; research
    Language English
    Dates of publication 2022-0515
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2022.112724
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Remediation of microplastics using bionanomaterials: A review.

    Chellasamy, Gayathri / Kiriyanthan, Rose Mary / Maharajan, Theivanayagam / Radha, A / Yun, Kyusik

    Environmental research

    2022  Volume 208, Page(s) 112724

    Abstract: Pollution by microplastics (MPs) formed by the physicochemical breakdown of plastics are a worldwide issue with long-lasting and hazardous natural effects. The natural expulsion of MPs takes several years and can be dangerous. Several effective ... ...

    Abstract Pollution by microplastics (MPs) formed by the physicochemical breakdown of plastics are a worldwide issue with long-lasting and hazardous natural effects. The natural expulsion of MPs takes several years and can be dangerous. Several effective technological innovations have been developed over the years to remediate harmful MPs. Among them, a blend of nanotechnological techniques using bionanomaterials has been investigated to a large extent. The objective of this review is to compile the MPs found in the environment and bionanomaterial-based approaches for their removal. This information is important for researchers who are exploring the adverse consequences of MPs and their remediation and developing advanced eco-friendly strategies to control and eradicate MPs in the future. The control and eradication of MPs depend on all of us; hence, the proper awareness of MPs pollution must be provided to every individual, as all of us are a part of the environment.
    MeSH term(s) Environmental Monitoring ; Environmental Pollution/prevention & control ; Humans ; Microplastics ; Plastics ; Population Health ; Water Pollutants, Chemical/analysis
    Chemical Substances Microplastics ; Plastics ; Water Pollutants, Chemical
    Language English
    Publishing date 2022-01-11
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 205699-9
    ISSN 1096-0953 ; 0013-9351
    ISSN (online) 1096-0953
    ISSN 0013-9351
    DOI 10.1016/j.envres.2022.112724
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Green synthesized carbon quantum dots from maple tree leaves for biosensing of Cesium and electrocatalytic oxidation of glycerol

    Chellasamy, Gayathri / Arumugasamy, Shiva Kumar / Govindaraju, Saravanan / Yun, Kyusik

    Chemosphere. 2022 Jan., v. 287

    2022  

    Abstract: Carbon quantum dots (CQDs) synthesized from biological sources play a significant role in biomedical and environmental applications, including bioimaging, biosensing, metal ions detection and electrocatalytic oxidations. Herein, we synthesized blue- ... ...

    Abstract Carbon quantum dots (CQDs) synthesized from biological sources play a significant role in biomedical and environmental applications, including bioimaging, biosensing, metal ions detection and electrocatalytic oxidations. Herein, we synthesized blue-emitting carbon quantum dots using maple tree leaves via a one-step hydrothermal process to detect Cesium ions selectively. The synthesized CQDs' functional group composition, morphology, and pH stability was analytical and morphologically investigated. The maple leaves derived carbon quantum dots (M-CQDs) exhibited blue fluorescence, and their sizes ranged from 1 to 10 nm. They exhibited emission at 445 nm upon excitation at 360 nm. M-CQDs PL intensity was highly stable for about 100 d without any changes and confirmed that the as-prepared CQDs could be used as a probe for Cesium ion sensing. M-CQDs were effectively used as Cesium sensing probes based on the electron transfer process and simultaneously used as a catalyst for glycerol electrooxidation. The PL intensity of M-CQDs was quenched while adding the varies concentration of Cesium ions in the linear range from 100 μM to 100 nM with the detection limit of (LOD) 160 nM, simultaneously electrocatalytic oxidation of glycerol showed an onset potential of 1.32 V at a current density of 10 mA/cm².
    Keywords Acer ; bioimaging ; catalysts ; cesium ; detection limit ; electron transfer ; fluorescence ; glycerol ; oxidation ; pH stability
    Language English
    Dates of publication 2022-01
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2021.131915
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: Green synthesized carbon quantum dots from maple tree leaves for biosensing of Cesium and electrocatalytic oxidation of glycerol.

    Chellasamy, Gayathri / Arumugasamy, Shiva Kumar / Govindaraju, Saravanan / Yun, Kyusik

    Chemosphere

    2021  Volume 287, Issue Pt 1, Page(s) 131915

    Abstract: Carbon quantum dots (CQDs) synthesized from biological sources play a significant role in biomedical and environmental applications, including bioimaging, biosensing, metal ions detection and electrocatalytic oxidations. Herein, we synthesized blue- ... ...

    Abstract Carbon quantum dots (CQDs) synthesized from biological sources play a significant role in biomedical and environmental applications, including bioimaging, biosensing, metal ions detection and electrocatalytic oxidations. Herein, we synthesized blue-emitting carbon quantum dots using maple tree leaves via a one-step hydrothermal process to detect Cesium ions selectively. The synthesized CQDs' functional group composition, morphology, and pH stability was analytical and morphologically investigated. The maple leaves derived carbon quantum dots (M-CQDs) exhibited blue fluorescence, and their sizes ranged from 1 to 10 nm. They exhibited emission at 445 nm upon excitation at 360 nm. M-CQDs PL intensity was highly stable for about 100 d without any changes and confirmed that the as-prepared CQDs could be used as a probe for Cesium ion sensing. M-CQDs were effectively used as Cesium sensing probes based on the electron transfer process and simultaneously used as a catalyst for glycerol electrooxidation. The PL intensity of M-CQDs was quenched while adding the varies concentration of Cesium ions in the linear range from 100 μM to 100 nM with the detection limit of (LOD) 160 nM, simultaneously electrocatalytic oxidation of glycerol showed an onset potential of 1.32 V at a current density of 10 mA/cm
    MeSH term(s) Acer ; Carbon ; Cesium ; Glycerol ; Plant Leaves ; Quantum Dots ; Trees
    Chemical Substances Cesium (1KSV9V4Y4I) ; Carbon (7440-44-0) ; Glycerol (PDC6A3C0OX)
    Language English
    Publishing date 2021-08-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2021.131915
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Zn-MOF decorated bio activated carbon for photocatalytic degradation, oxygen evolution and reduction catalysis.

    Govindaraju, Saravanan / Arumugasamy, Shiva Kumar / Chellasamy, Gayathri / Yun, Kyusik

    Journal of hazardous materials

    2021  Volume 421, Page(s) 126720

    Abstract: An emerging global necessity for alternative resources combined with maximum catalytic efficiency, low cost, and eco-friendly composite remains a hotspot in the scientific society. Hereby, a novel protocol is approached to design a heterostructure of ... ...

    Abstract An emerging global necessity for alternative resources combined with maximum catalytic efficiency, low cost, and eco-friendly composite remains a hotspot in the scientific society. Hereby, a novel protocol is approached to design a heterostructure of Zinc MOF decorated on the surface of 2D activated carbon (AC) through a simplistic approach. To begin with, analytical, morphological and spectroscopical studies were performed to identify the functional moieties, cruciate-flower like morphology and oxidative state of atoms present in the composite Zn-MOF @AC. The photocatalytic material aids in degrading both cationic and anionic dye in a UV (254 nm) irradiated environment at a rate of 86.4% and 77.5% within 90 mins. Subsequently, the hybrid materials are coated on the carbon substrate to evaluate the catalytic activity using oxygen evolution and reduction reaction process. The mechanical insight for the catalytic activity relies on the electronic transitions of atoms on the edges of the sheets ascribing to d-d energy levels between the interfacial electron movement. Our composite exhibits an overpotential of 0.7 V and a Tafel slope of 70 mV/dec for the oxygen reduction reaction. This study proposes an alternate approach for developing MOF decorated carbon-based composites for photocatalytic degradability and energy necessity.
    MeSH term(s) Catalysis ; Charcoal ; Oxidation-Reduction ; Oxygen ; Zinc
    Chemical Substances Charcoal (16291-96-6) ; Zinc (J41CSQ7QDS) ; Oxygen (S88TT14065)
    Language English
    Publishing date 2021-07-26
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1491302-1
    ISSN 1873-3336 ; 0304-3894
    ISSN (online) 1873-3336
    ISSN 0304-3894
    DOI 10.1016/j.jhazmat.2021.126720
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  8. Article ; Online: The role of metal transporters in phytoremediation: A closer look at Arabidopsis.

    Maharajan, Theivanayagam / Chellasamy, Gayathri / Tp, Ajeesh Krishna / Ceasar, Stanislaus Antony / Yun, Kyusik

    Chemosphere

    2022  Volume 310, Page(s) 136881

    Abstract: Pollution of the environment by heavy metals (HMs) has recently become a global issue, affecting the health of all living organisms. Continuous human activities (industrialization and urbanization) are the major causes of HM release into the environment. ...

    Abstract Pollution of the environment by heavy metals (HMs) has recently become a global issue, affecting the health of all living organisms. Continuous human activities (industrialization and urbanization) are the major causes of HM release into the environment. Over the years, two methods (physical and chemical) have been widely used to reduce HMs in polluted environment. However, these two methods are inefficient and very expensive to reduce the HMs released into the atmosphere. Alternatively, researchers are trying to remove the HMs by employing hyper-accumulator plants. This method, referred to phytoremediation, is highly efficient, cost-effective, and eco-friendly. Phytoremediation can be divided into five types: phytostabilization, phytodegradation, rhizofiltration, phytoextraction, and phytovolatilization, all of which contribute to HMs removal from the polluted environment. Brassicaceae family members (particularly Arabidopsis thaliana) can accumulate more HMs from the contaminated environment than those of other plants. This comprehensive review focuses on how HMs pollute the environment and discusses the phytoremediation measures required to reduce the impact of HMs on the environment. We discuss the role of metal transporters in phytoremediation with a focus on Arabidopsis. Then draw insights into the role of genome editing tools in enhancing phytoremediation efficiency. This review is expected to initiate further research to improve phytoremediation by biotechnological approaches to conserve the environment from pollution.
    MeSH term(s) Arabidopsis/metabolism ; Biodegradation, Environmental ; Membrane Transport Proteins/metabolism ; Metals, Heavy/analysis ; Plants/metabolism ; Soil/chemistry ; Soil Pollutants/analysis
    Chemical Substances Membrane Transport Proteins ; Metals, Heavy ; Soil ; Soil Pollutants
    Language English
    Publishing date 2022-10-15
    Publishing country England
    Document type Review ; Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2022.136881
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  9. Article: Drug Delivery Application of Functional Nanomaterials Synthesized Using Natural Sources.

    Veerapandian, Mekala / Ramasundaram, Subramaniyan / Jerome, Peter / Chellasamy, Gayathri / Govindaraju, Saravanan / Yun, Kyusik / Oh, Tae Hwan

    Journal of functional biomaterials

    2023  Volume 14, Issue 8

    Abstract: Nanomaterials (NMs) synthesized from natural sources have been attracting greater attention, due to their intrinsic advantages including biocompatibility, stimuli-responsive property, nontoxicity, cost-effectiveness, and non-immunogenic characteristics ... ...

    Abstract Nanomaterials (NMs) synthesized from natural sources have been attracting greater attention, due to their intrinsic advantages including biocompatibility, stimuli-responsive property, nontoxicity, cost-effectiveness, and non-immunogenic characteristics in the biological environment. Among various biomedical applications, a breakthrough has been achieved in the development of drug delivery systems (DDS). Biocompatibility is necessary for treating a disease safely without any adverse effects. Some components in DDS respond to the physiological environment, such as pH, temperature, and functional group at the target, which facilitates targeted drug release. NM-based DDS is being applied for treating cancer, arthritis, cardiovascular diseases, and dermal and ophthalmic diseases. Metal nanomaterials and carbon quantum dots are synthesized and stabilized using functional molecules extracted from natural sources. Polymers, mucilage and gums, exosomes, and molecules with biological activities are directly derived from natural sources. In DDS, these functional components have been used as drug carriers, imaging agents, targeting moieties, and super disintegrants. Plant extracts, biowaste, biomass, and microorganisms have been used as the natural source for obtaining these NMs. This review highlights the natural sources, synthesis, and application of metallic materials, polymeric materials, carbon dots, mucilage and gums, and exosomes in DDS. Aside from that, challenges and future perspectives on using natural resources for DDS are also discussed.
    Language English
    Publishing date 2023-08-15
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2648525-4
    ISSN 2079-4983
    ISSN 2079-4983
    DOI 10.3390/jfb14080426
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  10. Article: Analytical insights of COVID-19 pandemic.

    Chellasamy, Gayathri / Arumugasamy, Shiva Kumar / Govindaraju, Saravanan / Yun, Kyusik

    Trends in analytical chemistry : TRAC

    2020  Volume 133, Page(s) 116072

    Abstract: Coronavirus disease-19 (COVID-19) is caused by the severe acute respiratory syndrome coronavirus 2 (2019-nCoV or SARS-CoV-2). Genomic analysis has revealed that bat and pangolin coronaviruses are phylogenetically related to SARS-CoV-2. The actual origin ... ...

    Abstract Coronavirus disease-19 (COVID-19) is caused by the severe acute respiratory syndrome coronavirus 2 (2019-nCoV or SARS-CoV-2). Genomic analysis has revealed that bat and pangolin coronaviruses are phylogenetically related to SARS-CoV-2. The actual origin and passage history of the virus are unknown, but human-human transmission of the virus has been confirmed. Several diagnostic techniques have been developed to detect COVID-19 in this prevailing pandemic period. In this review, we provide an overview of SARS-CoV-2 and other coronaviruses. The origin, structure, current diagnostic techniques, such as molecular assays based on oligonucleotides, immunoassay-based detection, nanomaterial-based biosensing, and distinctive sample based detection are also discussed. Furthermore, our review highlights the admissible treatment strategies for COVID-19 and future perspectives on the development of biosensing techniques and vaccines for the diagnosis and prevention of the disease, respectively.
    Keywords covid19
    Language English
    Publishing date 2020-10-17
    Publishing country Netherlands
    Document type Journal Article ; Review
    ZDB-ID 2014041-1
    ISSN 0165-9936
    ISSN 0165-9936
    DOI 10.1016/j.trac.2020.116072
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